.header {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  height: 100%;
  padding-top: 57px;
  background: url(./header_bg.png) no-repeat;
  /* 缩放背景图片以完全覆盖背景区 */
  background-size: cover;
}

.header-title {
  margin-bottom: 17px;
  color: #fff;
  font-size: 18px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}
